Diff Checker – Compare Two Texts Easily
Compare two versions of text and see line-by-line differences. Perfect for article drafts, copywriting, configuration files, or code snippets. Everything runs in your browser, safe for sensitive content.
Paste directly or upload files on both sides, then see the differences in the panel below.
Left file (Original)
Supports text files: .txt, .md, .log, .json, .js, etc.
No file yet. Use the textarea below or upload a file.
Right file (Modified)
Upload the latest version to compare.
No file yet. Use the textarea below or upload a file.
Comparison result
Differences are shown per line on the left and right sides.
Detected changes
Merged result
Adjust merge per diff above, or use these global buttons to configure everything at once.
File will be downloaded as .txt.
Common use cases
- Compare copy or article drafts before and after revisions.
- Compare configuration (env, config files) between two environments.
- Check small code changes without opening Git.
🪄 Productivity tool for text & code100% free, everything runs in your browser
What is the Diff Checker from SONO-Solutions?
The Diff Checker from SONO-Solutions is an online tool for comparing two pieces of text and seeing line-by-line differences. It's perfect for comparing article drafts, marketing copy, configuration files, or small code snippets without installing extra apps. All processing happens locally in your browser, making it safe for sensitive content.
When is a diff checker useful?
- • Reviewing changes between two article or blog post drafts.
- • Checking updates to landing page copy or UX microcopy.
- • Comparing configuration files (ENV, YAML, JSON) across environments.
- • Inspecting small code changes without opening a full Git diff.
Features of the SONO-Solutions Diff Checker
- • Line-by-line comparison of two text blocks.
- • Highlighted lines for added, removed, or changed content.
- • Side-by-side view that's easy to scan.
- • All processing runs locally in your browser, no uploads.
- • Completely free to use, with no account required.
How to use the Diff Checker
- 1. Paste the first version of your text into the left editor.
- 2. Paste the second version into the right editor.
- 3. Trigger the comparison if needed (or see it update automatically).
- 4. Review the highlighted lines showing differences between both sides.
- 5. Scroll through and decide which changes to keep, merge, or discard.
It's a lightweight companion to version control systems — great for quick reviews and text comparisons without firing up heavy tooling.
Practical use cases
- • Reviewing copy changes from clients or marketing teams.
- • Checking small tweaks in server or app configuration files.
- • Comparing snippets from different branches or pull requests.
- • Making sure no important lines were lost during manual merges.
Frequently asked questions about the Diff Checker
Is this Diff Checker free to use?
Yes. The Diff Checker and all tools on SONO-Solutions are free to use directly in your browser. No account, no subscription, and no limit on how many comparisons you run.
Does the tool store or upload my text?
No. Everything runs locally in your browser. Your text is not sent to or stored on SONO-Solutions servers, making it safe for confidential drafts and internal documents.
Is this meant to replace Git diffs?
It's not a replacement for Git, but a lightweight companion. It's ideal for comparing small snippets or single files quickly, without opening a full repository or running Git commands.
Quick Guide
Use the tool or form on this page when you need to complete the task described at the top. If you are unsure whether this is the right tool, check the short description and the examples below to confirm it delivers the output you need.
How to Use
- Read the tool description to understand its main function and limits.
- Provide the requested input (text, file, or selection) following the examples.
- Hit the primary action button above (e.g., Generate/Convert/Analyze).
- Review the output; iterate with adjustments if necessary.
- Use copy/download buttons when available to save the result.
Sample Input & Output
- Input: raw text, a URL, or a file as instructed above.
- Output: formatted content, a new file, or a visual preview ready to use.
- Check any notes on the page for size or data-type limits.
Quick FAQ
- What should I do if the result looks wrong? Try a different example input, clean up the formatting (remove extra characters), and run it again.
- Is this tool free to use? Yes, the main features are available without signing up.
- Can I use it on mobile? Most tools are optimized for smaller screens.
Security & Privacy
Most processing happens in your browser, so data is not sent to the server unless explicitly noted on the page. Avoid entering sensitive or confidential information, and clear results after use if the device is shared.